SAIA PCDII

Disclaimer: This posting is a work in progress. I’ve mode this some years ago and was asked to provide some documentation:

I have parts of a SAIA PCDII that I wanted to make use out of. The ourput boards have 6 relais each and 8 of them are connected to a backplane connector. This makes 48 mains voltage (low current) switchable channels.
Confusing what I mean? Have a look at this video

I’ve found some of the pictures I took while working on this and just a few days ago I found the box with the hardware itself.

For now the old pictures.

One of the output modulesI desoldered the ICs to work out the schematicdetailed picture of the output board sans ICsEight output boards in the extension case